Steam not validating game files

extends the set of allowed characters to include all the above, plus the remaining characters in the range U 0001–U 001F.At the same time, however, it restricts the use of C0 and C1 control characters other than U 0009 (Horizontal Tab), U 000A (Line Feed), U 000D (Carriage Return), and U 0085 (Next Line) by requiring them to be written in escaped form (for example U 0001 must be written as or its equivalent).Consider the Chinese character "中", whose numeric code in Unicode is hexadecimal 4E2D, or decimal 20,013.A user whose keyboard offers no method for entering this character could still insert it in an XML document encoded either as An alternative encoding mechanism such as Base64 is needed to represent such characters.In the case of C1 characters, this restriction is a backwards incompatibility; it was introduced to allow common encoding errors to be detected.

The processor (as the specification calls it) is often referred to colloquially as an XML parser.XML provides escape facilities for including characters that are problematic to include directly.For example: All permitted Unicode characters may be represented with a numeric character reference.An XML attribute can only have a single value and each attribute can appear at most once on each element.In the common situation where a list of multiple values is desired, this must be done by encoding the list into a well-formed XML attribute XML documents consist entirely of characters from the Unicode repertoire.Disparate systems communicate with each other by exchanging XML messages.


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